:root {
  --ink: #172033;
  --muted: #5c667a;
  --line: #d8dde7;
  --paper: #ffffff;
  --soft: #f4f6f9;
  --navy: #102540;
  --blue: #1e5b96;
  --teal: #207c74;
  --gold: #a77b32;
  --shadow: 0 18px 44px rgba(18, 35, 58, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 12px clamp(18px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 260px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #fff;
  background: var(--navy);
  border-radius: 6px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
  line-height: 1.3;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 22px;
  color: #344053;
  font-size: 14px;
}

.nav a {
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover {
  color: var(--blue);
  border-color: var(--blue);
}

.hero {
  position: relative;
  min-height: min(720px, calc(100vh - 44px));
  display: grid;
  align-items: center;
  overflow: hidden;
  background: var(--navy);
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  object-fit: cover;
  object-position: center right;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(10, 25, 43, 0.92) 0%, rgba(10, 25, 43, 0.74) 38%, rgba(10, 25, 43, 0.25) 72%, rgba(10, 25, 43, 0.1) 100%),
    linear-gradient(0deg, rgba(10, 25, 43, 0.34), rgba(10, 25, 43, 0));
}

.hero-content {
  position: relative;
  max-width: 760px;
  padding: 84px clamp(20px, 6vw, 88px) 112px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #93d8d1;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 680px;
  margin-bottom: 18px;
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 650px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 1.8vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 6px;
  font-weight: 700;
  white-space: nowrap;
}

.button.primary {
  background: #fff;
  color: var(--navy);
}

.button.secondary {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.62);
}

.section {
  padding: 76px clamp(20px, 6vw, 88px);
}

.intro {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: -44px;
  position: relative;
  z-index: 2;
  padding-top: 0;
}

.metric,
.service-card,
.contact-box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.metric {
  min-height: 178px;
  padding: 24px;
}

.metric span {
  color: var(--gold);
  font-weight: 800;
}

.metric strong {
  display: block;
  margin: 8px 0;
  font-size: 20px;
}

.metric p,
.service-card p,
.section-heading p,
.solution-copy p,
.timeline p,
.contact p {
  color: var(--muted);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.service-card {
  min-height: 260px;
  padding: 24px;
}

.icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 20px;
  color: #fff;
  background: var(--blue);
  border-radius: 6px;
  font-weight: 800;
}

.service-card:nth-child(2) .icon {
  background: var(--teal);
}

.service-card:nth-child(3) .icon {
  background: var(--navy);
}

.service-card:nth-child(4) .icon {
  background: var(--gold);
}

.band {
  background: var(--soft);
  border-block: 1px solid var(--line);
}

.solution-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: 42px;
  align-items: start;
}

.solution-copy {
  padding: 8px 0;
}

.solution-copy h3 {
  font-size: clamp(24px, 2.5vw, 34px);
}

.solution-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.solution-list li {
  display: grid;
  grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.solution-list span {
  color: var(--muted);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.timeline div {
  min-height: 226px;
  padding: 24px;
  background: #fff;
}

.timeline span {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 18px;
  color: #fff;
  background: var(--navy);
  border-radius: 50%;
  font-weight: 800;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 460px);
  gap: 42px;
  align-items: start;
  background: var(--navy);
  color: #fff;
}

.contact .eyebrow {
  color: #93d8d1;
}

.contact p {
  max-width: 680px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.contact-box {
  display: grid;
  gap: 10px;
  padding: 26px;
  color: var(--ink);
  font-style: normal;
}

.contact-box strong {
  font-size: 20px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding: 22px clamp(20px, 6vw, 88px);
  color: #667085;
  background: #f8fafc;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .intro,
  .service-grid,
  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .solution-layout,
  .contact {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .brand {
    min-width: 0;
  }

  .brand strong {
    font-size: 14px;
  }

  .hero {
    min-height: 680px;
  }

  .hero-image {
    object-position: 64% center;
  }

  .hero-overlay {
    background: linear-gradient(90deg, rgba(10, 25, 43, 0.95) 0%, rgba(10, 25, 43, 0.82) 68%, rgba(10, 25, 43, 0.56) 100%);
  }

  .hero-content {
    padding: 62px 20px 94px;
  }

  .button {
    width: 100%;
  }

  .section {
    padding: 56px 20px;
  }

  .intro {
    grid-template-columns: 1fr;
    padding-top: 0;
  }

  .service-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .solution-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}